Question

Draw a splitting tree, similar to Figures 13-32 and 13-33, for proton Hc in styrene. What is the chemical shift of proton Hc?

Short answer

Answer

The splitting tree is:

The signal H_c is split ( J_ac =11H_Z) by coupling with H_aand further split( J_bc =2H_Z) by coupling with H_b .

Step-by-step solution

Styrene

The phenomenon of splitting of a single peak into various peaks is known as slitting of signals. Non-equivalent protons on adjacent carbon atoms give rise to splitting of signals. The chemical formula of styrene is C₈H₈ and its structure is shown below.

Structure of styrene

Explanation

The chemical shift ($\delta$) of proton H_c in styrene is 3.2ppm and the splitting tree for proton is shown below.

Splitting tree

The signal H_c is split ( J_ac =11H_Z) by coupling with H_aand further split( J_bc =2H_Z) by coupling with H_b .